Supersnelle erbijsommen en erafsommen tot 20
In de mix
|
1.
9 – 6 =
4
1
2
3
|
2.
2 – 1 =
2
1
3
4
|
3.
9 – 3 =
3
6
1
2
|
4.
1 – 1 =
2
0
4
3
|
|
5.
19 – 8 =
1
11
3
2
|
6.
9 + 0 =
2
3
1
9
|
7.
17 – 13 =
2
1
4
3
|
8.
8 – 7 =
1
2
4
3
|
|
9.
6 – 6 =
0
3
2
4
|
10.
9 + 2 =
11
1
3
2
|
11.
17 + 1 =
18
4
2
3
|
12.
10 – 3 =
2
7
3
1
|
|
13.
12 – 7 =
1
2
5
3
|
14.
14 – 3 =
1
3
2
11
|
15.
8 + 9 =
4
3
17
2
|
16.
15 – 2 =
3
2
1
13
|
|
17.
15 + 4 =
2
19
3
4
|
18.
19 + 1 =
3
20
2
4
|
19.
8 + 4 =
1
12
2
3
|
20.
15 – 12 =
3
2
1
4
|